/**
  ******************************************************************************
  * @file    USB_Device/DualCore_Standalone/Src/usbd_cdc_desc.c
  * @author  MCD Application Team
  * @brief   This file provides the USBD descriptors and string formatting method.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "usbd_core.h"
#include "usbd_desc.h"
#include "usbd_conf.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define USBD_VCP_VID                      0x0483
#define USBD_VCP_PID                      0x5740
#define USBD_VCP_LANGID_STRING            0x409
#define USBD_VCP_MANUFACTURER_STRING      "STMicroelectronics"
#define USBD_VCP_PRODUCT_HS_STRING        "STM32 Virtual ComPort in HS Mode"
#define USBD_VCP_SERIALNUMBER_HS_STRING   "00000000001A"
#define USBD_VCP_PRODUCT_FS_STRING        "STM32 Virtual ComPort in FS Mode"
#define USBD_VCP_SERIALNUMBER_FS_STRING   "00000000001B"
#define USBD_VCP_CONFIGURATION_HS_STRING  "VCP Config"
#define USBD_VCP_INTERFACE_HS_STRING      "VCP Interface"
#define USBD_VCP_CONFIGURATION_FS_STRING  "VCP Config"
#define USBD_VCP_INTERFACE_FS_STRING      "VCP Interface"

/* Private macro -------------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
uint8_t *USBD_VCP_DeviceDescriptor(USBD_SpeedTypeDef speed, uint16_t *length);
uint8_t *USBD_VCP_LangIDStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length);
uint8_t *USBD_VCP_ManufacturerStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length);
uint8_t *USBD_VCP_ProductStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length);
uint8_t *USBD_VCP_SerialStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length);
uint8_t *USBD_VCP_ConfigStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length);
uint8_t *USBD_VCP_InterfaceStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length);

/* Private variables ---------------------------------------------------------*/
USBD_DescriptorsTypeDef VCP_Desc = {
  USBD_VCP_DeviceDescriptor,
  USBD_VCP_LangIDStrDescriptor, 
  USBD_VCP_ManufacturerStrDescriptor,
  USBD_VCP_ProductStrDescriptor,
  USBD_VCP_SerialStrDescriptor,
  USBD_VCP_ConfigStrDescriptor,
  USBD_VCP_InterfaceStrDescriptor,  
};

/* USB Standard Device Descriptor */
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
  #pragma data_alignment=4   
#endif
__ALIGN_BEGIN uint8_t USBD_VCP_DeviceDesc[USB_LEN_DEV_DESC] __ALIGN_END = {
  0x12,                       /* bLength */
  USB_DESC_TYPE_DEVICE,       /* bDescriptorType */
  0x00,                       /* bcdUSB */
  0x02,
  0x02,                       /* bDeviceClass */
  0x02,                       /* bDeviceSubClass */
  0x00,                       /* bDeviceProtocol */
  USB_MAX_EP0_SIZE,           /* bMaxPacketSize */
  LOBYTE(USBD_VCP_VID),           /* idVendor */
  HIBYTE(USBD_VCP_VID),           /* idVendor */
  LOBYTE(USBD_VCP_PID),           /* idVendor */
  HIBYTE(USBD_VCP_PID),           /* idVendor */
  0x00,                       /* bcdDevice rel. 2.00 */
  0x02,
  USBD_IDX_MFC_STR,           /* Index of manufacturer string */
  USBD_IDX_PRODUCT_STR,       /* Index of product string */
  USBD_IDX_SERIAL_STR,        /* Index of serial number string */
  USBD_MAX_NUM_CONFIGURATION  /* bNumConfigurations */
}; /* USB_DeviceDescriptor */

/* USB Standard Device Descriptor */
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
  #pragma data_alignment=4   
#endif
__ALIGN_BEGIN uint8_t USBD_VCP_LangIDDesc[USB_LEN_LANGID_STR_DESC] __ALIGN_END = {
  USB_LEN_LANGID_STR_DESC,         
  USB_DESC_TYPE_STRING,       
  LOBYTE(USBD_VCP_LANGID_STRING),
  HIBYTE(USBD_VCP_LANGID_STRING), 
};

#if defined ( __ICCARM__ ) /*!< IAR Compiler */
  #pragma data_alignment=4   
#endif
__ALIGN_BEGIN uint8_t USBD_VCP_StrDesc[USBD_MAX_STR_DESC_SIZ] __ALIGN_END;

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Returns the device descriptor. 
  * @param  speed: Current device speed
  * @param  length: Pointer to data length variable
  * @retval Pointer to descriptor buffer
  */
uint8_t *USBD_VCP_DeviceDescriptor(USBD_SpeedTypeDef speed, uint16_t *length)
{
  *length = sizeof(USBD_VCP_DeviceDesc);
  return USBD_VCP_DeviceDesc;
}

/**
  * @brief  Returns the LangID string descriptor.        
  * @param  speed: Current device speed
  * @param  length: Pointer to data length variable
  * @retval Pointer to descriptor buffer
  */
uint8_t *USBD_VCP_LangIDStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length)
{
  *length = sizeof(USBD_VCP_LangIDDesc);  
  return USBD_VCP_LangIDDesc;
}

/**
  * @brief  Returns the product string descriptor. 
  * @param  speed: Current device speed
  * @param  length: Pointer to data length variable
  * @retval Pointer to descriptor buffer
  */
uint8_t *USBD_VCP_ProductStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length)
{
  if(speed == USBD_SPEED_HIGH)
  {   
    USBD_GetString((uint8_t *)USBD_VCP_PRODUCT_HS_STRING, USBD_VCP_StrDesc, length);
  }
  else
  {
    USBD_GetString((uint8_t *)USBD_VCP_PRODUCT_FS_STRING, USBD_VCP_StrDesc, length);    
  }
  return USBD_VCP_StrDesc;
}

/**
  * @brief  Returns the manufacturer string descriptor. 
  * @param  speed: Current device speed
  * @param  length: Pointer to data length variable
  * @retval Pointer to descriptor buffer
  */
uint8_t *USBD_VCP_ManufacturerStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length)
{
  USBD_GetString((uint8_t *)USBD_VCP_MANUFACTURER_STRING, USBD_VCP_StrDesc, length);
  return USBD_VCP_StrDesc;
}

/**
  * @brief  Returns the serial number string descriptor.        
  * @param  speed: Current device speed
  * @param  length: Pointer to data length variable
  * @retval Pointer to descriptor buffer
  */
uint8_t *USBD_VCP_SerialStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length)
{
  if(speed == USBD_SPEED_HIGH)
  {    
    USBD_GetString((uint8_t *)USBD_VCP_SERIALNUMBER_HS_STRING, USBD_VCP_StrDesc, length);
  }
  else
  {
    USBD_GetString((uint8_t *)USBD_VCP_SERIALNUMBER_FS_STRING, USBD_VCP_StrDesc, length);    
  }
  return USBD_VCP_StrDesc;
}

/**
  * @brief  Returns the configuration string descriptor.    
  * @param  speed: Current device speed
  * @param  length: Pointer to data length variable
  * @retval Pointer to descriptor buffer
  */
uint8_t *USBD_VCP_ConfigStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length)
{
  if(speed == USBD_SPEED_HIGH)
  {  
    USBD_GetString((uint8_t *)USBD_VCP_CONFIGURATION_HS_STRING, USBD_VCP_StrDesc, length);
  }
  else
  {
    USBD_GetString((uint8_t *)USBD_VCP_CONFIGURATION_FS_STRING, USBD_VCP_StrDesc, length); 
  }
  return USBD_VCP_StrDesc;  
}

/**
  * @brief  Returns the interface string descriptor.        
  * @param  speed: Current device speed
  * @param  length: Pointer to data length variable
  * @retval Pointer to descriptor buffer
  */
uint8_t *USBD_VCP_InterfaceStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length)
{
  if(speed == 0)
  {
    USBD_GetString((uint8_t *)USBD_VCP_INTERFACE_HS_STRING, USBD_VCP_StrDesc, length);
  }
  else
  {
    USBD_GetString((uint8_t *)USBD_VCP_INTERFACE_FS_STRING, USBD_VCP_StrDesc, length);
  }
  return USBD_VCP_StrDesc;  
}


